Results 21 to 30 of about 491 (132)
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 5, May 2023., 2023 Abstract Recent studies have shown that biosignatures of ancient microbial life exist in mineral coatings in deep bedrock fractures of Precambrian cratons, but such surveys have been few and far between. Here, we report results from southwestern Sweden in an area of 1.6–1.5 Ga Paleoproterozoic rocks heavily reworked by the 1.14–0.96 Ga Sveconorwegian ...
Henrik Drake +4 more
wiley +1 more source
Environmental Toxicology and Chemistry, Volume 42, Issue 1, Page 7-18, January 2023., 2023 Abstract In the present study, we investigated the possibility of identifying the source oils of exposed fish using ratios of bicyclic sesquiterpane (bicyclane) chemical biomarkers. In the event of an oil spill, identification of source oil(s) for assessment, or for litigation purposes, typically uses diagnostic ratios of chemical biomarkers to produce
Francis D. Spilsbury +6 more
wiley +1 more source
Rheological behavior of asphaltite-modified bituminous binders
, 2013 This work focuses on the rheological properties of asphaltite-modified bituminous binders. The natural asphaltite, employed to modify a petroleum-derived-bitumen, is mined in Albania.
Duchez, Jean-Louis +4 more
core +5 more sources
ORGANIC GEOCHEMICAL CHARACTERISTICS OF ŞIRNAK ASPHALTITES IN SOUTHEAST ANATOLIA, TURKEY; pp. 58–83 [PDF]
Oil Shale, 2010 In this study, the organic geochemical properties of asphaltites in Åırnak region in Southeast Anatolia are given in detail. Total organic carbon, Rock-Eval pyrolysis, gas chromatography of saturated fractions, gas chromatoÂgraphy-mass spectrometry ...
O. KAVAK +3 more
doaj +1 more source
Geochemical research of asphaltite formation in the Orenburg region [PDF]
E3S Web of Conferences, 2019 The results of the studies of the physicochemical properties and genesis of asphaltites from the deposits of the Orenburg region are considered. Based on the data of a study on the distribution of hydrocarbon biomarkers (n-alkanes, isoprenanes, steranes,
Zakharchenko Maria +2 more
doaj +1 more source
Characterization of the fishing asphaltites in Boyacá-Cantera Santa Teresa
Revista Ingenio, 2013 The purpose of this research article is to show the characterization and design of MDC-2-INVIAS 2007 type bituminous mixtures with stone aggregates and asphaltite conglomerates from the Santa Teresa de Pesca mine - Boyacá, following the MODIFIED MARSHALL
Carlos Hernando Higuera Sandoval +2 more
doaj +1 more source
Geobiology, Volume 16, Issue 5, Page 556-574, September 2018., 2018 Abstract In the deep biosphere, microbial sulfate reduction (MSR) is exploited for energy. Here, we show that, in fractured continental crystalline bedrock in three areas in Sweden, this process produced sulfide that reacted with iron to form pyrite extremely enriched in 34S relative to 32S.
Henrik Drake +8 more
wiley +1 more source
Assessment of simultaneous incorporation of crumb rubber and asphaltite in asphalt binders
Dyna, 2019 Every day, roads are submitted to greater stresses. Thereby, additives have been incorporated to asphalt mixtures to enhance pavements performance. The purpose of this experimental study is to characterize for the first time, to date, the viscoelastic ...
Javier Eduardo Mantilla Forero +1 more
doaj +1 more source
Revista UIS Ingenierías, 2020 Subsurface exploration using geophysical methods has increased the prospective economic possibilities for new non-metallic minerals and other raw materials such as solid hydrocarbons.
Yesid Paul Goyes-Peñafiel +2 more
doaj